Effect of Tween 80 and monensin on ruminal fermentation of the diet containing 70% wheat straw treated by white-rot fungus in artificial rumen
Jalc, D.
Berliner und Münchener Tierärztliche Wochenschrift 115(11-12): 453-457
2002
ISSN/ISBN: 0005-9366 PMID: 12481653 Document Number: 550950
The objective of this study was to investigate the effect of Tween 80 and monensin on rumen fermentation of a diet containing 70% wheat straw treated by white-rot fungus Pleurotus tuber-regium (TWS-PT) and 30% barley in artificial rumen (RUSITEC). The RUSITEC consisted of four fermentation vessels (V1, V2, V3, V4): V1 was without additives (control), V2 received 10 mg monensin daily, V3 received 0.5% Tween 80 (volume by weight -1)/V4 daily, using a combination of 10 mg monensin with 0.5% Tween 80 (volume/weight). After an adaptation period of 6 days, the fermentation parameters were determined for six consecutive days. Tween 80 did not affect the rumen fermentation of the diet consisting of 70% TWS-PT and 30% barley in RUSITEC. Monensin affected the rumen fermentation of the diet by decreasing the degradability of DM, neutral detergent fibre (NDF), acid detergent fibre (ADF), hemicellulose, cellulose (P<0.001), the decrease of methane production (P<0.001) and the higher proportion of propionate within the volatile fatty acids (P<0.001) compared with control. Tween 80 did not improve the potency of monensin. Only some indices of the increase mol% of propionate (~3.4%) and the decrease of methane production (~ 0.47 mmol/day) were found by using Tween 80 plus monensin compared with the use of monensin alone.